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Quarterly report pursuant to Section 13 or 15(d)

SHAREHOLDERS' EQUITY Schedule of Shareholders' Equity (Details)

v2.4.0.8
SHAREHOLDERS' EQUITY Schedule of Shareholders' Equity (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Stockholders' Equity Attributable to Parent $ 5,779.7 Ìý $ 5,779.7 Ìý $ 4,632.7 Ìý
Stockholders' Equity Attributable to Noncontrolling Interest 1,154.9 Ìý 1,154.9 Ìý 1,128.2 Ìý
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 6,934.6 7,689.2 6,934.6 7,689.2 5,760.9 7,039.7
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS 117.2 85.1 370.2 719.0 Ìý Ìý
INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTEREST (3.3) (6.7) 5.8 25.2 Ìý Ìý
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 113.9 78.4 376.0 744.2 Ìý Ìý
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 178.4 123.9 247.4 760.6 Ìý Ìý
Other Comprehensive Income (Loss), Net of Tax 62.1 40.3 (119.6) 46.1 Ìý Ìý
OTHER COMPREHENSIVE INCOME ATTRIBUTABLE TO THE NONCONTROLLING INTEREST (0.9) (1.5) (3.2) (4.5) Ìý Ìý
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Ìý Ìý 256.4 790.3 Ìý Ìý
Stock and Other Incentive Plans Ìý Ìý 9.6 9.0 Ìý Ìý
Common and Preferred Shares dividends Ìý Ìý (104.7) Ìý Ìý Ìý
Common shares dividends Ìý Ìý Ìý (217.8) Ìý Ìý
Undistributed Gains To Noncontrolling Interest Ìý Ìý Ìý 11.3 Ìý Ìý
Capital Contribution By Noncontrolling Interest Ìý Ìý 17.7 64.7 Ìý Ìý
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Ìý Ìý Ìý (8.0) Ìý Ìý
Cliffs Shareholders Equity [Member]
Ìý Ìý Ìý Ìý Ìý Ìý
Stockholders' Equity Attributable to Parent 5,779.7 6,336.8 5,779.7 6,336.8 4,632.7 5,785.0
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS Ìý Ìý 370.2 719.0 Ìý Ìý
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Ìý Ìý (122.8) 41.6 Ìý Ìý
Other Comprehensive Income (Loss), Net of Tax Ìý Ìý Ìý 41.6 Ìý Ìý
Comprehensive Income (Loss), Net of Tax, Attributable to Parent Ìý Ìý 247.4 760.6 Ìý Ìý
Stock and Other Incentive Plans Ìý Ìý 9.6 9.0 Ìý Ìý
Common and Preferred Shares dividends Ìý Ìý (104.7) Ìý Ìý Ìý
Undistributed Gains To Noncontrolling Interest Ìý Ìý Ìý 0 Ìý Ìý
Capital Contribution By Noncontrolling Interest Ìý Ìý 0 0 Ìý Ìý
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Ìý Ìý Ìý 0 Ìý Ìý
Noncontrolling Interest [Member]
Ìý Ìý Ìý Ìý Ìý Ìý
Stockholders' Equity Attributable to Noncontrolling Interest 1,154.9 1,352.4 1,154.9 1,352.4 1,128.2 1,254.7
INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTEREST Ìý Ìý 5.8 25.2 Ìý Ìý
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Ìý Ìý 3.2 4.5 Ìý Ìý
OTHER COMPREHENSIVE INCOME ATTRIBUTABLE TO THE NONCONTROLLING INTEREST Ìý Ìý 9.0 29.7 Ìý Ìý
Stock and Other Incentive Plans Ìý Ìý 0 0 Ìý Ìý
Common and Preferred Shares dividends Ìý Ìý 0 Ìý Ìý Ìý
Common shares dividends Ìý Ìý Ìý 0 Ìý Ìý
Undistributed Gains To Noncontrolling Interest Ìý Ìý Ìý 11.3 Ìý Ìý
Capital Contribution By Noncontrolling Interest Ìý Ìý 17.7 64.7 Ìý Ìý
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Ìý Ìý Ìý (8.0) Ìý Ìý
Common Stock [Member]
Ìý Ìý Ìý Ìý Ìý Ìý
Stock Issued During Period, Value, New Issues Ìý Ìý 285.3 Ìý Ìý Ìý
Common Stock [Member] | Cliffs Shareholders Equity [Member]
Ìý Ìý Ìý Ìý Ìý Ìý
Stock Issued During Period, Value, New Issues Ìý Ìý 285.3 Ìý Ìý Ìý
Common shares dividends Ìý Ìý Ìý (217.8) Ìý Ìý
Common Stock [Member] | Noncontrolling Interest [Member]
Ìý Ìý Ìý Ìý Ìý Ìý
Stock Issued During Period, Value, New Issues Ìý Ìý 0 Ìý Ìý Ìý
Preferred Class A [Member]
Ìý Ìý Ìý Ìý Ìý Ìý
Stock Issued During Period, Value, New Issues Ìý Ìý 709.4 Ìý Ìý Ìý
Preferred Class A [Member] | Cliffs Shareholders Equity [Member]
Ìý Ìý Ìý Ìý Ìý Ìý
Stock Issued During Period, Value, New Issues Ìý Ìý 709.4 Ìý Ìý Ìý
Preferred Class A [Member] | Noncontrolling Interest [Member]
Ìý Ìý Ìý Ìý Ìý Ìý
Stock Issued During Period, Value, New Issues Ìý Ìý $ 0 Ìý Ìý Ìý